CODEWITHSUNDEEP
javajson
kiran
kiran

Reputation: 87

Java object graph to JSON conversion, with cycles

How to convert a Java object graph to JSON, where the graph has circular dependencies / cycles?

Upvotes: 4

Views: 4828

Answers (4)

NikhilKesari
NikhilKesari

Reputation: 36

Not sure about what you mean by circular dependencies, JSON has no possibility to express references. There are a lot of opensource JSON lib's do check out the link http://x-stream.github.io/json-tutorial.html for converting java object to JSON

Upvotes: 0

jk.
jk.

Reputation: 7696

Note: this answer was written a long time ago. Use Gson, Jersey or Jackson.

I went with json-simple on my last project. It doesn't bring in any unneeded project dependencies (such as apache-commons jars) and was enough to parse/generate JSON correctly.

You'll still have to manage circular references yourself. I really doubt there is such a library that is built to handle this. You can do this easily by added to a Set any objects that you convert, and then just checking to see if the object you're about to convert is in the set.

Also, I don't think json-simple automatically serializes an object; that is, you have to feed it the data you want added to the JSON. It just handles all of the messy formatting for you.

Upvotes: 2

oak
oak

Reputation: 3028

if you using fasterxml . there is new and call option @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = "@id")

. checkout this for more info

just make sure your fasterxml in at the right version for that

Upvotes: 0

Aravind Yarram
Aravind Yarram

Reputation: 80194

There are many open source libraries that can generate JSON. Jersey can break the circular dependencies. For others you might want to google.

Upvotes: 7

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